works greatBy Brianon 8/15/2013

Works great, saw a difference the next day. Does have a lot of dust in it though but the price is right.

Great Value Geat ProductBy mltnguyenon 8/8/2013

mltnguyen would recommend this product to a friend

This product came well packed and had very little dust. A++ BRS

GoodBy Yunieron 8/6/2013

Yunier would recommend this product to a friend

This will lower your phosphate and great price for quality items.

Excellent ProductBy Tankjunkieon 7/30/2013

Tankjunkie would recommend this product to a friend

I've been using GFO from BRS for awhile and have no complaints. Keeps phosphates in check very effectively. I always recommend GFO to anyone having phosphate issues.

Use it on all my tanksBy Williamon 7/22/2013

William would recommend this product to a friend

I absolutely can't do without the BRS bulk GFO. It drastically improved the water quality of all of my aquariums. A 180gal reef tank and a 110gal fish only. Phosphate levels are almost not existent now after using the GFO, especially in the dual GFO and carbon media reactor.

great productBy Bobon 7/11/2013

Bob would recommend this product to a friend

this has cured my algae problems before. I now dont run a saltwater tank without it.

I'm Sold!By Ericon 7/5/2013

Eric would recommend this product to a friend

This stuff is the most cost effective phosphate solution I have found. Could not be happier with the product.

Cant do without it.By Randyon 7/1/2013

Randy would recommend this product to a friend

Everytime I run out of this thing and think I am doing well, I have to run and get some more. Awesome product

Worth the money!By Johnon 6/28/2013

John would recommend this product to a friend

Easy to use, have used different brands of GFO in the past. After adding BRS GFO, algae problems have reduced to nothing!

gfo quailityBy hunteron 6/25/2013

hunter would recommend this product to a friend

Ordered up some of this gfo.. Samre as the carbon seems to be doing a good job so far. Also did not notice much waste when rinsing it off.. huge deal for me when your looking at gfo prices..

GREAT PRODUCT AT A GREAT PRICE!!!By Dolmo5000on 6/25/2013

Dolmo5000 would recommend this product to a friend

BRS does it again! I have looked far and wide for GFO at a cheaper price. Although there are a very few places advertising it for a cheaper price reviews of the product say it contains lots and lots of dust. I believe that BRS sells a fantastic product and will purchase GFO and all other bulk additive from them as long as I'm in the hobby (rest of my life). GREAT JOB BRS!!!

now winning the battleBy algae victoryon 6/13/2013

algae victory would recommend this product to a friend

Had a pretty good algae bloom in reef tank 1yo. Never used GFO decided to give it a try in my sump sock. Day two seeing significant results oh and new sock was green after day one.

Instructions on package were confusingBy Charleson 6/12/2013

Charles would recommend this product to a friend

I got this from a friend that had taken down his tank. I am overall satisfied with the product itself, but the instructions were confusing and I believe i used way too much after the initial period. I got some clarity on it with the calculator. My pump went up on me for a couple days and i started noticing algae growth almost instantly. Got a new pump and did a water change and the GFO did the rest.

Good quality GFOBy Billon 6/7/2013

Bill would recommend this product to a friend

This GFO works well and is very cost efficient way of removing PO4 in any aquarium. No problems does exactly what it is supposed to do.
I do find that it has more fines to be rinsed than some higher quality GFO (RowaPhos).

effective and good priceBy Mikeon 6/2/2013

Used regularly it has transformed my reef from an algae jungle to a coral jungle!

GFO WorksBy ACon 5/15/2013

AC would recommend this product to a friend

With the use of the BRS GFO I have removed just about all my algae problems in my tank.

SOLID PURCHASE!!!By Dolmo5000on 5/6/2013

Dolmo5000 would recommend this product to a friend

Although I find the need to flush BRS gfo more than others I have used in the past, the cost difference more than makes up. Another solid product out of the BRS team!

Not sure yetBy Michaelon 4/29/2013

Michael would recommend this product to a friend

Have been using for about 3 weeks so far with no change in my phosphate level. Doing water changes also. Need more time to evaluate not sure about recommending yet. Phos Ban maybe better.

Great Stuff!By Edwardon 4/26/2013

Edward would recommend this product to a friend

Made the mistake of trying a different brand after using BR GFO; I'm back!

it really does work people so buy it! By dimitrion 4/18/2013

dimitri would recommend this product to a friend

i am running my gfo thought the BRS Dual Reactor its amazing and completely worth it buy it you will not regret it. fixed my tank and all the algae problems it had.

will always use By Pongoon 4/17/2013

Pongo would recommend this product to a friend

Having started with SW in the dark ages and then coming back to it alot has changed and gfo is certainly a great product. I had been battling dino's for a few weeks. Within 24 hrs of starting with gfo I noticed a immediate reduction in dinos to almost complete elimination in less than a week.

Great product at a Great Price By Bparetion 4/15/2013

Bpareti would recommend this product to a friend

Summary says it all.
could not ask for more.

GFO works best for phosphate removalBy Vincenton 4/14/2013

Vincent would recommend this product to a friend

I run the GFO in A BRS dual Reactor with carbon. Never have any phosphate issues.

Great ProductBy Johnon 4/13/2013

John would recommend this product to a friend

Brs gfo is the best value of all gfo. It pulls the phosphate out and keeps it down

Great product but attention to detain in packaging the product is lackingBy Glennon 4/11/2013

Glenn would recommend this product to a friend

Great product. My first purchase of this product was exceptional in all ways, but my recent purchase was less than desireable. The 5 gallon container had GFO all over the outside of the plastic bucket and in the bottom of the shipping box.
Attention to detain was lacking!

GFOBy DAVEon 4/11/2013

DAVE would recommend this product to a friend

Best price for any gfo. You will not regret this purchase

Beat price GFO aroundBy Shawnon 4/11/2013

Shawn would recommend this product to a friend

I was at a big box store the other day and saw less than 6oz of GFO for about 40 bucks here you can get 2lbs of a great product for same price. my phosphates stay low keeps allege in check and corals growing.

Great ProductBy Travison 4/8/2013

Travis would recommend this product to a friend

This works really well. My phosphates continue to stay really low.

works greatBy Andy Con 4/8/2013

Andy C would recommend this product to a friend

I'm running 1.5 cups in the dual reactor for 200 gallons, which is half of what the BRS calculator recommends. The reactor can't handle much more per cartridge and still keep things flowing. I change it every two weeks, rather than use 3 cups and change monthly. So far so good with this system.

Eventually I want to get a separate reactor for carbon and then just run 1.5 cups in each side of the dual reactor, but the system is working so far for me.

great stuffBy royon 4/6/2013

roy would recommend this product to a friend

Best price for gfo. You will not regret this purchase as your corals will thank you and so will your wallet

Good gfo for the costBy garrisonon 4/5/2013

garrison would recommend this product to a friend

I used this in a filter sock and reactor, i recommend the reactor. Anyway, this stuff is great, it eats right through phosphates. No more algae!

Less is moreBy Christianon 4/4/2013

Christian would recommend this product to a friend

Does what it should. My only complaint is the particle size, as it can work through the sponges in your reactor. Makes setting the flow a bit tricky. I would suggest starting with a little less than the recommended amount by the BRS calculator. GFO can and does release Iron into your system, so use only what you need. Saves your system from Iron (HARD to get back out) and your wallet, at the same time! Also, I run one gallon of tank water through my reactor, to rinse, when I change it out. Helps a lot with the fines.

Less is moreBy Christianon 4/4/2013

Christian would recommend this product to a friend

Does what it should. My only complaint is the particle size, as it can work through the sponges in your reactor. Makes setting the flow a bit tricky. I would suggest starting with a little less than the recommended amount by the BRS calculator. GFO can and does release Iron into your system, so use only what you need. Saves your system from Iron (HARD to get back out) and your wallet, at the same time! Also, I run one gallon of tank water through my reactor, to rinse, when I change it out. Helps a lot with the fines.

Works as expectedBy Nickon 4/3/2013

Nick would recommend this product to a friend

I run this GFO in a mesh bag in my sump (no reactor), and it has helped with PO4 in my FOWLR. Very reasonable price, too.

it worksBy Dustinon 3/31/2013

Dustin would recommend this product to a friend

300 gal mixed reef two reactors for gfo. my phosephates are never over .02 so it work.moderate feeder.only down side IMO its a little pricy for a tank my size

Excellent productBy Chrison 3/26/2013

Chris would recommend this product to a friend

this was a great addition to my tank. cleared up my algae problem within the first few days of use. the BRS calculator was a big help with this as well.

Works as statedBy Bradon 3/25/2013

Brad would recommend this product to a friend

GFO works great as part of my filtration system to keep everything in check. I just added a reactor to the mix to make better use of my media.

great stuffBy chrison 3/24/2013

chris would recommend this product to a friend

This is a must if you want to have a successful reef tank.

Buying Bulk is the BombBy Nathanon 3/18/2013

Nathan would recommend this product to a friend

This stuff works great and I save money. What's not to love? No complaints. My wife commented my SPS corals looked happier and more colorful just a few hours after I started the GFO reactor.

small particle sizeBy willardon 3/17/2013

willard would recommend this product to a friend

be careful of how much flow you use to make this tumble.if you run too much it blow some it into your sump area.other than that works to keep phospahtes low

Good product.By Felixpawson 3/13/2013

Felixpaws would recommend this product to a friend

I've used this for years, and I highly recommend it, for its phosphate reduction. I have no choice, but to use unfiltered well water, and this works great to reduce phosphates, in my 75 gallon, and 120 gallon reef tanks. I have a clam, anemones, and sps in the tank, all growing great.

works wellBy brasson 3/12/2013

brass would recommend this product to a friend

notice less algae on the glass. the particles are fine and i gave it a little to much juice the first time and gfo was all over my sump and display.. so low flow through the reactor!!

Added Insurance!By Davidon 3/10/2013

David would recommend this product to a friend

I was having problems with GHA, though my Nitrates and Phosphates tested in the '0' range. Upon addition of GFO, I noticed a reduction in the algae. It would no longer return when I physically removed it. It didn't happen overnight, but the reduction was obvious. I put about 4 OZ in a bag in the sump and replace every several months. It's part of my routine maintenance.

great productBy vinny on 3/2/2013

vinny would recommend this product to a friend

great for the money in my opinion no difference from the high compacity so i would definetly recommend

Very efficientBy Isaacon 2/28/2013

Isaac would recommend this product to a friend

Works very well, phosphate dropped very quickly and stayed down low.

Great productBy Anthonyon 2/26/2013

Anthony would recommend this product to a friend

Used this on my 150 gallon reef tank. My phosphate started at .55 and in 2 weeks my levels slowly dropped to .00 great product!!!! Clears easy tumbles nicely and price is right!!! Thanks brs

best price around quality stuffBy andrewon 2/17/2013

andrew would recommend this product to a friend

I have been using BRS GFO for over a year. works fantastic and the price cant be beat. Thanks BRS